Big Pete is embarrassed about his job as a golf-course range boy, so he dons a bear costume as a disguise.

Little Pete experiences a new sensation: winning baseball. But the team's "superslushy" victory libation throws the players a curve.

Big Pete tries to get a varsity letter and climb to the top of the social ladder the easy way by joining the wrestling team, and finds that individual sports are not a cakewalk. He trains for a confrontation at the big match with "Endless" Mike Hellstrom, and is coached by Ellen, a huge wrestling fan. However, Ellen's efforts to coach Big Pete are threatened by the school's wrestling coach, Beano Glattner.

The gang spends a typical Saturday in Wellsville. Ellen tries to deliver a pizza dressed as a bunny, Wayne tries to keep his new white sneakers clean, Monica keeps the streets safe as she looks for an evil ninja, Big Pete gets a haircut, and Bus Driver Stu gets frustrated with a traffic light that rarely changes to green, and when it does, won't stay that way for more than a few seconds.

It's April 1st and little Pete has planned the best April Fool's joke ever. With the help of Nona, Monica the KrebScout, Wayne, and surprisingly, Pit Stain and his cronies, he pulls off the mother of all pranks. The butt of his joke? Principal Swinger and a group of eight singers that come to the school annually to promote hygiene.